/* $OpenBSD: dh.c,v 1.2 2014/08/28 14:23:52 jsing Exp $ */ /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com) * All rights reserved. * * This package is an SSL implementation written * by Eric Young (eay@cryptsoft.com). * The implementation was written so as to conform with Netscapes SSL. * * This library is free for commercial and non-commercial use as long as * the following conditions are aheared to. The following conditions * apply to all code found in this distribution, be it the RC4, RSA, * lhash, DES, etc., code; not just the SSL code. The SSL documentation * included with this distribution is covered by the same copyright terms * except that the holder is Tim Hudson (tjh@cryptsoft.com). * * Copyright remains Eric Young's, and as such any Copyright notices in * the code are not to be removed. * If this package is used in a product, Eric Young should be given attribution * as the author of the parts of the library used. * This can be in the form of a textual message at program startup or * in documentation (online or textual) provided with the package. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * "This product includes cryptographic software written by * Eric Young (eay@cryptsoft.com)" * The word 'cryptographic' can be left out if the rouines from the library * being used are not cryptographic related :-). * 4. If you include any Windows specific code (or a derivative thereof) from * the apps directory (application code) you must include an acknowledgement: * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)" * * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * The licence and distribution terms for any publically available version or * derivative of this code cannot be changed. i.e. this code cannot simply be * copied and put under another distribution licence * [including the GNU Public Licence.] */ #include /* for OPENSSL_NO_DH */ #ifndef OPENSSL_NO_DH #include #include #include #include #include "apps.h" #include #include #include #include #include #include /* -inform arg - input format - default PEM (DER or PEM) * -outform arg - output format - default PEM * -in arg - input file - default stdin * -out arg - output file - default stdout * -check - check the parameters are ok * -noout * -text * -C */ int dh_main(int, char **); int dh_main(int argc, char **argv) { DH *dh = NULL; int i, badops = 0, text = 0; BIO *in = NULL, *out = NULL; int informat, outformat, check = 0, noout = 0, C = 0, ret = 1; char *infile, *outfile, *prog; #ifndef OPENSSL_NO_ENGINE char *engine; #endif #ifndef OPENSSL_NO_ENGINE engine = NULL; #endif infile = NULL; outfile = NULL; informat = FORMAT_PEM; outformat = FORMAT_PEM; prog = argv[0]; argc--; argv++; while (argc >= 1) { if (strcmp(*argv, "-inform") == 0) { if (--argc < 1) goto bad; informat = str2fmt(*(++argv)); } else if (strcmp(*argv, "-outform") == 0) { if (--argc < 1) goto bad; outformat = str2fmt(*(++argv)); } else if (strcmp(*argv, "-in") == 0) { if (--argc < 1) goto bad; infile = *(++argv); } else if (strcmp(*argv, "-out") == 0) { if (--argc < 1) goto bad; outfile = *(++argv); } #ifndef OPENSSL_NO_ENGINE else if (strcmp(*argv, "-engine") == 0) { if (--argc < 1) goto bad; engine = *(++argv); } #endif else if (strcmp(*argv, "-check") == 0) check = 1; else if (strcmp(*argv, "-text") == 0) text = 1; else if (strcmp(*argv, "-C") == 0) C = 1; else if (strcmp(*argv, "-noout") == 0) noout = 1; else { BIO_printf(bio_err, "unknown option %s\n", *argv); badops = 1; break; } argc--; argv++; } if (badops) { bad: BIO_printf(bio_err, "%s [options] outfile\n", prog); BIO_printf(bio_err, "where options are\n"); BIO_printf(bio_err, " -inform arg input format - one of DER PEM\n"); BIO_printf(bio_err, " -outform arg output format - one of DER PEM\n"); BIO_printf(bio_err, " -in arg input file\n"); BIO_printf(bio_err, " -out arg output file\n"); BIO_printf(bio_err, " -check check the DH parameters\n"); BIO_printf(bio_err, " -text print a text form of the DH parameters\n"); BIO_printf(bio_err, " -C Output C code\n"); BIO_printf(bio_err, " -noout no output\n"); #ifndef OPENSSL_NO_ENGINE BIO_printf(bio_err, " -engine e use engine e, possibly a hardware device.\n"); #endif goto end; } #ifndef OPENSSL_NO_ENGINE setup_engine(bio_err, engine, 0); #endif in = BIO_new(BIO_s_file()); out = BIO_new(BIO_s_file()); if ((in == NULL) || (out == NULL)) { ERR_print_errors(bio_err); goto end; } if (infile == NULL) BIO_set_fp(in, stdin, BIO_NOCLOSE); else { if (BIO_read_filename(in, infile) <= 0) { perror(infile); goto end; } } if (outfile == NULL) { BIO_set_fp(out, stdout, BIO_NOCLOSE); } else { if (BIO_write_filename(out, outfile) <= 0) { perror(outfile); goto end; } } if (informat == FORMAT_ASN1) dh = d2i_DHparams_bio(in, NULL); else if (informat == FORMAT_PEM) dh = PEM_read_bio_DHparams(in, NULL, NULL, NULL); else { BIO_printf(bio_err, "bad input format specified\n"); goto end; } if (dh == NULL) { BIO_printf(bio_err, "unable to load DH parameters\n"); ERR_print_errors(bio_err); goto end; } if (text) { DHparams_print(out, dh); #ifdef undef printf("p="); BN_print(stdout, dh->p); printf("\ng="); BN_print(stdout, dh->g); printf("\n"); if (dh->length != 0) printf("recommended private length=%ld\n", dh->length); #endif } if (check) { if (!DH_check(dh, &i)) { ERR_print_errors(bio_err); goto end; } if (i & DH_CHECK_P_NOT_PRIME) printf("p value is not prime\n"); if (i & DH_CHECK_P_NOT_SAFE_PRIME) printf("p value is not a safe prime\n"); if (i & DH_UNABLE_TO_CHECK_GENERATOR) printf("unable to check the generator value\n"); if (i & DH_NOT_SUITABLE_GENERATOR) printf("the g value is not a generator\n"); if (i == 0) printf("DH parameters appear to be ok.\n"); } if (C) { unsigned char *data; int len, l, bits; len = BN_num_bytes(dh->p); bits = BN_num_bits(dh->p); data = malloc(len); if (data == NULL) { perror("malloc"); goto end; } l = BN_bn2bin(dh->p, data); printf("static unsigned char dh%d_p[] = {", bits); for (i = 0; i < l; i++) { if ((i % 12) == 0) printf("\n\t"); printf("0x%02X, ", data[i]); } printf("\n\t};\n"); l = BN_bn2bin(dh->g, data); printf("static unsigned char dh%d_g[] = {", bits); for (i = 0; i < l; i++) { if ((i % 12) == 0) printf("\n\t"); printf("0x%02X, ", data[i]); } printf("\n\t};\n\n"); printf("DH *get_dh%d()\n\t{\n", bits); printf("\tDH *dh;\n\n"); printf("\tif ((dh = DH_new()) == NULL) return(NULL);\n"); printf("\tdh->p = BN_bin2bn(dh%d_p, sizeof(dh%d_p), NULL);\n", bits, bits); printf("\tdh->g = BN_bin2bn(dh%d_g, sizeof(dh%d_g), NULL);\n", bits, bits); printf("\tif ((dh->p == NULL) || (dh->g == NULL))\n"); printf("\t\treturn(NULL);\n"); printf("\treturn(dh);\n\t}\n"); free(data); } if (!noout) { if (outformat == FORMAT_ASN1) i = i2d_DHparams_bio(out, dh); else if (outformat == FORMAT_PEM) i = PEM_write_bio_DHparams(out, dh); else { BIO_printf(bio_err, "bad output format specified for outfile\n"); goto end; } if (!i) { BIO_printf(bio_err, "unable to write DH parameters\n"); ERR_print_errors(bio_err); goto end; } } ret = 0; end: BIO_free(in); if (out != NULL) BIO_free_all(out); if (dh != NULL) DH_free(dh); return (ret); } #endif